Tetraphidales

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Tetraphidales (subclass Bryidae) An order of small, acrocarpous mosses; the leaves are usually crowded at the tops of the sterile stems, forming cup-shaped ‘gemma cups’ within which discoid gemmae are formed. The capsule is unique in having a peristome with only 4 teeth. They are found on peaty banks, rotten logs, etc.

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